ISO7721BDW

Overview

The ISO7721BDW is a dual-channel digital isolator from Texas Instruments, housed in a 16-SOIC package. It features capacitive coupling technology with a reinforced insulation rating of 5000 Vrms. The device supports data rates up to 100 Mbps and operates within a supply voltage range of 2.25 V to 5.5 V. Key electrical parameters include a maximum propagation delay of 16 ns, typical rise/fall times of 1.8 ns/1.9 ns, and a common-mode transient immunity of 85 kV/µs. It functions unidirectionally with a 1/1 channel configuration and maintains an operating temperature range from -55°C to +125°C.

Feature Summary

• Provides robust electromagnetic compatibility through reinforced isolation architecture.
• Utilizes capacitive coupling for high-speed signal transmission across isolation barriers.
• Ensures signal integrity with low pulse width distortion characteristics.

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment needing reinforced safety isolation
• Power metering applications with high common-mode noise

Procurement Notes

Verify component authenticity as the ISO7721BDW is officially obsolete and no longer manufactured by Texas Instruments. Confirm that any available units are genuine surplus or verify if alternative replacement parts are required for new designs. Check datasheet revisions for any specific handling or storage requirements associated with legacy inventory.

Selection Notes

Select this component only for maintenance or retrofit projects where the original design specifies the ISO7721BDW. For new developments, consider active alternatives within the ISO772x family or newer generations that offer similar pinouts and specifications but remain in current production. Ensure the 16-SOIC footprint matches the existing PCB layout constraints.

Part Context

This part belongs to the ISO772x series of dual-channel digital isolators designed for general-purpose applications. It complements other variants like the ISO7721DW and automotive-grade ISO7721FQDWVRQ1. The series emphasizes high reliability and EMC performance for isolated communication interfaces in noisy environments.

Replacement Considerations

Public confirmed substitute part numbers are not explicitly listed in the provided documentation. Consult Texas Instruments for recommended MFR substitutes due to the obsolete status.